• Added support for job dependencies. (jberger, sri)
  
• Added parents option to enqueue methods in Minion and Minion::Backend::Pg. (jberger, sri)
  
• Added children and parents fields to info method in Minion::Job and job_info method in Minion::Backend::Pg.
  
• Added -P option to job command.
  
• Improved stats methods to include jobs with unresolved dependencies in delayed_jobs count.